Yea it was probably around 100$ worth, i was forced to pay 1 RP for a no-captcha spin, and the captcha was restored for the next free roll so its no big deal.
What is a big deal however is this bug I found that caused some money loss. A slip of the finger caused a wager to be placed worth the maximum allowed amount by the game (as much of a wager needed to yield the max 20BTC), way more than what I had in the bank. Waiting to hear back from support, hopefully they see this error and fix it (and maybe get my money back)
edit: it looks like they fixed the bug, it now refuses the wager with "insufficient funds to place this bet" instead of taking the entire bankroll. No return of my lost coins though...